The correct answer is option 'B', the Kellogg-Briand Pact.

The Kellogg-Briand Pact, also known as the General Treaty for Renunciation of War as an Instrument of National Policy, was an international agreement signed on August 27, 1928, by 65 countries. Its primary objective was to outlaw war as a means of resolving disputes between nations.

Below are the key points explaining the Kellogg-Briand Pact and its significance:

1. Background:
- The devastation caused by World War I led to a desire among nations to prevent future conflicts.
- French Foreign Minister Aristide Briand and U.S. Secretary of State Frank B. Kellogg proposed a treaty to renounce war as a policy.

2. Aims of the Pact:
- The main aim of the pact was to eliminate the use of war as a tool for resolving international conflicts.
- The countries signing the treaty pledged not to use war or the threat of war in their relations with one another.

3. Prohibition of War:
- The pact stated that signatory nations would "condemn recourse to war for the solution of international controversies."
- It sought to establish peaceful means of dispute resolution, such as negotiation, arbitration, and judicial settlement.

4. Signatories:
- Initially, 15 countries signed the Kellogg-Briand Pact, including major powers like the United States, France, Germany, and the United Kingdom.
- Eventually, a total of 65 countries joined the pact, representing a significant portion of the global community.

5. Limitations and Criticisms:
- The pact did not provide mechanisms for enforcement or specific penalties for non-compliance.
- Many countries, including some signatories, continued to engage in wars and conflicts despite their commitment to the pact.
- The enforcement of the pact remained largely ineffective, especially in the face of aggressive actions by countries like Japan, Italy, and Germany.

6. Legacy:
- Despite its limitations, the Kellogg-Briand Pact was a significant step towards the establishment of international norms against war.
- It laid the groundwork for the development of international law and institutions aimed at preventing conflicts, such as the United Nations.
- The pact reflected a growing recognition that war was not a viable solution to global problems and helped foster a global culture of peace and diplomacy.

In conclusion, the Kellogg-Briand Pact, signed in 1928 by 65 countries, aimed to outlaw war as a means of resolving disputes. While it lacked effective enforcement mechanisms, it played a crucial role in promoting the idea that peaceful means should be used to settle international conflicts.

The Kellogg-Briand Pact, signed in 1928 by 65 countries, aimed to outlaw war as a means of resolving disputes and promote peaceful conflict resolution.